Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Aquarium Dynamic Wallpapers+
Stunning, aquarium themed Live Wallpaper on your iPhone! Many beautifully designed, tropical moving wallpapers to choose from
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
155 ratings · Top 30%
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included18 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Aquarium Dynamic Wallpapers+: map the core Lifestyle workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Offer more diverse and regularly updated categories.
Assumption to check: Limited wallpaper categories
Validate with people who use this workflow before building.
Hypothesis 2
Introduce a subscription model for premium content.
Assumption to check: In-app purchases for all wallpapers
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to upload their own wallpapers.
Assumption to check: Lack of user-generated content
Validate with people who use this workflow before building.
Hypothesis 4
Integrate sharing features for users to share wallpapers on social media.
Assumption to check: No social sharing options
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Stunning, aquarium themed Live Wallpaper on your iPhone! Many beautifully designed, tropical moving wallpapers to choose from. Aquarium Live Wallpaper only works on iPhone 6s, 7, 8, X, Xs, Xs Max or later. Featuring sharks, clownfish (Nemo), blue tang (Dory) and many other colourful fish these long Aquarium Live Wallpaper scenes will light up your iPhone. Swipe between the various wallpapers to find your favourites. Then save the ones you would like to use to your Camera Roll. From there simply take the same steps you normally do to make regular photos your lockscreen and/or wallpaper. To play the aquarium scenes simply hold your finger to your lock screen. How to set as a live lock screen wallpaper: + Simply swipe between the Live Wallpapers + Touch the photo to play animation fully + If you like a particular live wallpaper, press the save button to save it to your Photo's app Camera Roll + To set as a live wallpaper for your lock screen press the action button and select wallpaper action + For best quality, please zoom out the picture because it is slightly zoomed in by default + If you touch the lock screen it will play your selected aquarium scene
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Redux
axios
react-navigation
shadcn/ui
BUILD KIT DIFFICULTY
Intermediate
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
